Mapping Conceptual Model Function to Complex Type in Entity Framework

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You might hear of KiGG, the open source project that is currently live as http://dotnetshoutout.com. I wanted to expose part of KiGG data as an OData Service for read only. But I figured out that exposing raw KiGG schema might not be useful. So I had to choose between 2 options that were up to my mind:
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Build some views on the physical store -database-. Create a new entity data model for those views and use the new data model context for DataServiceContext.
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Use Entity Framework 4.0 conceptual model function feature with complex types to simulate views. It’s like building views on the conceptual model itself and not the store model.